Defensive publication

ABSTRACT

THE INVENTION DISCLOSED HEREIN COMPRISES TREATING AN ESSENTIALLY AMORPHOUS POLYESTER TO RENDER IT MORE GRINDABLE AND COMPRISING THE STEPS OF EXTRUDING AN ESSENTIALLY AMORPHOUR POLYESTER AT A TEMPERATURE NO GREATER THAN 400* F. AND HEAT TREATING THE EXTRUDER POLYESTER AT A TEMPERATURE OF 150* F. TO 250* F. FOR ABOUT 1 MINUTE TO ABOUT 6 HOURS. THE POLYESTER SHOULD BE AN AMORPHOUS POLYMER CONTAINING NOR MORE THAN 10% CRYSTALLINITY IN WHICH THE ACID COMPONENT IS TEREPHTHALIC AND OR ISOPHTHALIC ACID AND THE GLYGOL COMPONENT IS SELECTED FROM ETHYLENE GLYCOL, BUTYLENE GLYCOL, NEOPENTY GLYCOL, AND CYCLOHEXANEDIMETHANOL. THE ESSENTIALLY AMORPHOUS POLYMER MAY CONTAIN PLASTICIZERS, FLOW ACIDS, STABILIZERS AND PIGMENTS USEFUL IN COMPOUNDING POWDER COATING COMPOSITIONS.

DEFENSIVE PUBLICATION UNITED STATES PATENT onnron Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 O.G. 687. The abstracts 01! Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public for inspection and reproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Oflice makes no assertion as to the novelty ot the disclosed subject matter.

PUBLISHED JULY 2, 1974 PROCESS FOR TREATING ESSENTIALLY AMOR- PHOUS POLYESTER COATING COMPOSITIONS Peter M. Grant, Rte. 16 37663, and Michael L. Whitt,

P.O. Box 3029 37664, both of Kingsport, Tenn.

Filed Sept. 27, 1973, Ser. No. 401,326 Int. Cl. 1329f 3/08 US Cl. 264-234 No Drawing. 6 Pages Specification The invention disclosed herein comprises treating an essentially amorphous polyester to render it more grindable and comprising the steps of extruding an essentially amorphous polyester at a temperature no greater than 400 F. and heat treating the extruded polyester at a temperature of 150 F. to 250 F. for about 1 minute to about 6 hours. The polyester should be an amorphous polymer containing not more than 10% crystallinity in which the acid component is terephthalic and/or isophthalic acid and the glycol component is selected from ethylene glycol, butylene glycol, neopentyl glycol, and cyclohexanedimethanol. The essentially amorphous polymer may contain plasticizers, flow aids, stabilizers and pigments useful in compounding powder coating compositions. 

